Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ef3b4b4463e8c1f…

MALICIOUS

PDF

57.1 KB Created: 2021-05-14 01:47:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: db12d04e293c5c90f31cb9db5b5f495b SHA-1: 60d99966543941a1ef8dafe3db7f98be6948db92 SHA-256: 1ef3b4b4463e8c1f1920f795fda59a7b2bef472e7ac0e8a3a0f1213ed9b4b1c2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links to known malicious redirectors, specifically promoting 'free generator / game hack' lures for popular games like Roblox and Coin Master. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites. No scripts were extracted, but the presence of numerous malicious URLs indicates a high likelihood of further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7726

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/431946152/free-roblox-gift-card-codes-game-hack In PDF document text
    • http://www.notaioricci.it/images/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://www.notaioricci.it/images/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/robux-get-com_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
    • http://www.notaioricci.it/images/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/minecraft-gun-mod-download-free_GM479516143.pdfIn PDF document text
    • http://www.notaioricci.it/images/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/good-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://www.notaioricci.it/images/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://www.notaioricci.it/images/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A3B 40740 bytes
SHA-256: 96286f3f99afa4dbc603b276e322c79426f7f43128c3a8df0508ba86f4551f9f
font_01_sfnt_off0000a1e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1E8 3992 bytes
SHA-256: 43e72e756231cfd354bd65c2ed3b09ad4eff56ad11e7f155ed2920e6bb7860dd
font_02_sfnt_off0000af0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF0A 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000bc1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC1B 18572 bytes
SHA-256: ffbc77db5113ad0b7fd344ce16d81dafdbf0c64cd7df39142b32362cc1b263a9

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